Description: Fast-acting, current-limiting fuse.

Ratings:
Volts: 600Vac (or less)
Amps: 1-600A
IR: 200kA RMS Sym.
Agency Information: CE, Std. 248-8, Class J, UL Listed, Guide JDDZ, File E4273, CSA Certified, Class 1422-02, File 53787.

General Information:
• Single-element, current-limiting fuses provide superior shortcircuit protection.
• Protects low interrupting capacity circuit breakers. Limits the short-circuit current to meet the interrupting capacity requirements of existing equipment.
• On older systems available short-circuit current may exceed the interrupting capacity of the circuit breakers, fuses can be installed in series with existing equipment.
• Well suited for lighting and heating circuits and other noninductive loads.
• Provides component short-circuit protection in compliance with NEC 110-10, where protection devices shall clear a fault without “extensive damage” to the circuit components.
• High interrupting rating helps meet the requirements of future system expansion and the increases in available utility shortcircuit current.
• Fuses can be selectively coordinated with ease.

Features and Benefits
• Current limitation for non-inductive circuits provides Class J current-limiting response to maximum ground fault and short-circuit conditions.
• 200kA interrupting rating provides high ratings at all circuit locations.
• Economical solutions for high-fault circuits.

Typical Applications
• Power Panelboards
• Machinery Disconnects

Dimensional Data





Catalog Numbers (Amps)

JKS-1	JKS-15	JKS-70	JKS-225
JKS-2	JKS-20	JKS-80	JKS-250
JKS-3	JKS-25	JKS-90	JKS-300
JKS-4	JKS-30	JKS-100	JKS-350
JKS-5	JKS-35	JKS-110	JKS-400
JKS-6	JKS-40	JKS-125	JKS-450
JKS-8	JKS-45	JKS-150	JKS-500
JKS-10	JKS-50	JKS-175	JKS-600
JKS-12	JKS-60	JKS-200

For superior electrical protection, Cooper Bussmann recommends upgrading JKS fuse
applications to Low-Peak LPJ fuses

Time-Current Characteristic Curves-Average Melt

Current Limitation Curves


Carton Quantity and Weight–JKS LIMITRON (600Vac)*

Amps	Carton Qty.	Weight**
		Lbs.	Kg.
1–30	10	0.95	0.43
35–60	10	1.175	0.532
70–100	5	0.28	0.127
110–200	1	0.86	0.39
225–400	1	1.78	0.807
450–600	1	3.07	1.392

*15-30A rated 200VDC, 31-60A rated 175VDC and 10 KAIC.
**Weight per carton.